Position-indicator.



UMTED stra-Tiss PATENT OFFICE. i

s. MIX, or'ocHEsTnn, NEW YORK, Assrenon 'ro Non 'rn EAST ELECTRIC cont-?ANY', or ROCHESTER, NEW YORK, A oonronAfrroN or NEW Yonx.

POSITION-INDICATOR Bpeccation of Letters Patent. y Patented Oct. 15,A1918.

"Application tiled January 21, 1918. Serial N o. 212,989.

Tol all whom `it may concern:

Be it knownthatL .EDWIN SrMIx, a citizen ofthe United Statesresiding at-Rochester,`in,the county' off Mon'roelan'd State of New York,:liavelinvented certain-new and usefuiimprovments in Position-Indicatorsand I do hereby declare the following to be afffull', clear, and exactdescription "of the invention, such as Will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to a device for indieating the position of somehidden movable member of a machine. such. for example, as the piston orthe crankshaft of an internalcombus'tion engine.

The object of the invention is to provide an indicator. for the purposeaforesaid, of simple and convenient form. which is adapted to be appliedto and to coperate with an external rotarv member of the machine orengine. in such a manner as to indicate the osition of such rotarvmember correspondlng to a specific or desired position of the hiddenart.

The invention accordingly comprises a bodv. preferablvin the form of ametal plate, having means for engagement with an external rotarv memberofthe machine or engine` and particularlv with convenient abutments orproiections on said member. The means or seats on the bodv for suchengagement are so located and formed as to insure a definite angularposition ofthe bodv of the indicator with reference to the rotarvmember. Tf. therefore. the bodv. While still so engaged with the rotarvmember, be brought also into a predetermined definite position. withrelation to the stationarv part or bodv of the machine or engine. bvrotation of the mechanism. the hidden movable member ywill have beenbrought to the desired definite position. Accordingly. means areattached to or mounted on the body of the indicator for indicating adefinite position of this bodv with respect to a stationary part of theengine. While such means mav be adapted for reference directlv to suchstationary part, I have found it more convenient to adapt them forreference rather to the horizontal. upon the assumption that thestationary part of the machine or engine will, at the Sametime. be in adefinite normal relation to the horizontal.

In the. accompanying' drawings Figure 1 1s a iront-elevation ot an1nd1cator embody- -ing the present invention, shown in operativerelation to a rotary member of an engine; and Fig. 2 is aside-elevationfofgthc indicator. -l

'The invention is illustrated as embodied in an indicator designedparticularly `for cooperation With a rotary member in the form of ashaft-coupling of wellknown form, this coupling comprising diametricallyarranged studs which serve conveniently as abutments to determine theangular relation of the indicator to the coupling.

The indicator comprises a body 5 of sheetmetal. having two dependingportions or legs 7 and 8 each provided. at its lower end. with arectangular recess or seat 9. The coupling with which the indicatorcopcrates comprises a disk 10 interposed between tu'o cross-arms 11. andthe ends of the arms arc connected with the disk bv studs. which arearranged diametricallv with respect to the disk. These studs have smoothround heads 12, and the seats 9 coperate with tivo of these heads. asshown. thus determining a definite angular relation of the bodv 5 to thecoupling and to the shafts which it connects. To retain the bodv inposition on the coupling. it is provided with a lug i3 which ovcrbangsthe upper edge of the disk l0.

Vith the indicator on the coupling in the position shown. it remainsonlv to move the engine-mechanism until the indicator has been broughtto a definite position with rela tion to the stationarv portion ot theengine. To determine this definite position the indicator is providedwith a level-glass (i. mounted in an opening in the upper part of thebodv 5. and when the bubble in this glass indicates a level position itis known that the studs 12 have been brought to a definite desiredposition. Assuming that the engine is also in normal relation to thehorizontal. it will then follow that its concealed parts. such aspistons and crank-shafts. are in a definite desired position. Theposition in question is usuallv that in which one of the pistons is atdead-center. and it will be obvious that the particular angle at whichthe seats 9 on the indicator are arranged will depend upon the design ofthe particular engine for which the indicator is used.

Where the indicator is used in connection with an engine on a vehicle,such engine being liable to departures from the normal horizwontalrandvertigini Poitions of its stationl frt's 'tf 1S hecessry; before `usingthe indicator, to bring the engine into norinal po$ition The5indielaitor may conveniently elued foi-thisnpurpose also, by holdingone of t e laterl edges of the body in engagement with a normallyvertioallurfaoe of the engine and then moving the latter, ifneloessai'y, untill ,thelevebglass 6 is Ain -level posltion.

l. A positionfindiogtor, fortan engine prothereon having projectingstuds, said indi- Gator oon'iprieing ineen@ for enggigingsaid studs# tofixlthefgtngnlgr rm "lation Offthe i'ndi ozbtor/ to said-ht', 'andvineens lfor indicating i definite position of the indicator withreferenoe'to Sonie other part of the engine.

2. A position-indicator, for ankgngine'provided'vviti a horizontal shaftand a, counting theregn having ,projecting studs, said indi- Gatorcomprising a plate provided with two seats, at its edge, ion@'ngatWo-,ofxsaid $11,@ sjilmiltgneouely, ,ang ywith.afilngifork enggigllg-,bsldy nouplinglto .maintain engggenienlt oftythelplaltewithi-itherstuds; and level-indient@ slammedby snijd plate.

Copies of this! patent may he obtained for/nyc@ llts egmh, by gqdgggiggthefqommtlsviomof Eutenti@

